Simplify all examples use common code consistently.

Simplify all examples use common code consistently.

Merge branch 'simplify'
* simplify:
  Belatedly update example id.
  TLS examples use unified common functionality.
  Remove old multi-goroutine examples.
  Unified functionality in multiple connection example.
  Unified functionality in 2 connections example.
  Unified functionality in single connection example.
  Use new common functionality for this demo.
  Remove old ack examples.
  Unified ack example.
  Add protocol display to conndisc example.
  Correct exampid output.
  Remove old receive examples.
  Unified sub / unsub scribe example.
  Remove old send examples.
  Unified publish example.
  Update conndisc godoc examples.
  Remove old conn / disc examples.
  Unified TLS connect / disconnect example.
  Unified connect / disconnect example:
  Simplified common example functionality.